NEET 2025 · ChemistryPrevious Year Question

Consider the following compounds: $KO X_{2}$ , $H X_{2} O X_{2}$ and $H X_{2} SO X_{4}$ . The oxidation states of the underlined elements ( $K$ in $KO X_{2}$ , $O$ in $H X_{2} O X_{2}$ , $S$ in $H X_{2} SO X_{4}$ ) in them are, respectively,

Answer: (C) (c) $+ 1$ , $- 1$ and $+ 6$ . \textbf{Answer:} (c) $+ 1$ , $- 1$ and $+ 6$ .

A.(a) $+ 1$ , $- 2$ and $+ 4$
B.(b) $+ 4$ , $- 4$ and $+ 6$
C.(c) $+ 1$ , $- 1$ and $+ 6$ ✓
D.(d) $+ 2$ , $- 2$ and $+ 6$

Correct Answer

Solution & Explanation

\textbf{Answer:} (c) $+ 1$ , $- 1$ and $+ 6$ . \textbf{Solution:} $KO X_{2}$ is potassium superoxide, in which $K$ is $+ 1$ (each $O$ is $- 1/2$ ). $H X_{2} O X_{2}$ is a peroxide, so $O$ is $- 1$ . In $H X_{2} SO X_{4}$ : $2 (+ 1) + S + 4 (- 2) = 0$ , giving $S$ $= + 6$ . Hence the underlined elements are $+ 1$ ( $K$ ), $- 1$ ( $O$ in peroxide) and $+ 6$ ( $S$ ), i.e. option (c).

🎯

43,000+ questions in हिंदी & English · one-tap toggle

Practice NEET 2025 Chemistry — free, with instant solutions

The app builds a daily goal from your weak topics and brings each question back just before you forget it — so what you solve today turns into marks on exam day.

Open →📚Practice all NEET Chemistry PYQs chapter-wise →💡Don't get it? Learn the Redox Equilibrium concepts →

← Chemistry Q42 Chemistry Q44 →

More NEET PYQ solutions

ChemIdentify the suitable reagent for the following conversion: C6H5COOCH3 -> C6H5CHO (methyl benzoate to benzaldehyde)ChemThe correct order of decreasing acidity of the following aliphatic acids is ChemThe major product of the following reaction is: 4-oxo-4-phenylbutanenitrile C6H5-CO-CH2-CH2-CN is treated with (i) CH3MgBr (excess) and then (ii) H3O+.ChemOut of the following complex compounds, which compound will have the minimum conductance in solution?ChemWhich of the following are paramagnetic? A. [NiCl4]^2- B. Ni(CO)4 C. [Ni(CN)4]^2- D. [Ni(H2O)6]^2+ E. Ni(PPh3)4 ChemThe correct order of the wavelength of light absorbed by the following complexes is: A. [Co(NH3)6]^3+ B. [Co(CN)6]^3- C. [Cu(H2O)4]^2+ D. [Ti(H2O)6]^3+ChemThe correct order of decreasing basic strength of the given amines is: (N-ethylethanamine = (C2H5)2NH; ethanamine = C2H5NH2; N-methylaniline = C6H5NH(CH3); benzenamine/aniline = C6H5NH2)ChemPredict the major product P in the following sequence of reactions. The starting material is 1-methylcyclopent-1-ene: (i) HBr, benzoyl peroxide; (ii) KCN; (iii) Na(Hg)/C2H5OH P (major). The structures of the options (A)-(D) are shown in the image below:

More: All NEET 2025 Chemistry PYQs · NEET Chemistry PYQs · All NEET PYQs · Previous year papers

Consider the following compounds: KOX2​, HX2​OX2​ and HX2​SOX4​. The oxidation states of the underlined elements (K in KOX2​, O in HX2​OX2​, S in HX2​SOX4​) in them are, respectively,

Solution & Explanation

More NEET PYQ solutions

Consider the following compounds: $KO X_{2}$ , $H X_{2} O X_{2}$ and $H X_{2} SO X_{4}$ . The oxidation states of the underlined elements ( $K$ in $KO X_{2}$ , $O$ in $H X_{2} O X_{2}$ , $S$ in $H X_{2} SO X_{4}$ ) in them are, respectively,